Auxiliary air-valve for charge-forming devices.



J. H.-FRIEDENWALD. AUXILIARY AIR VALVE FOR CHARGE FORMING DEVIGES.

APPLICATION FILED JAN. 3, 1910.

Patented May 31 recon n. r-nrEnnNwALn, or Barr ng-one, MARYLAND.

AUXILIARY nrnrvnnvn son. CHARGE-FORMING 'nnvrcns.

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Specification of Letters Patent.

Patented May 31, 1910..

Application filed January 3, 1910. Serial No. 536,246.

. To all whom "it concern:

Be it known that I, JACOB H. FRIEDEN- WALD, citizen of the United States, residing at Baltimore, Maryland, have invented certainnew and useful Improvements in Auxiliary Air-Valves for Charge-Forming Devices, of which the following is a specitication.

My present invention relates to improvements in auxiliary air valves for charge forming devices, and has for'its object to provide an extremely simple, durable, economical and efiicient device for maintaining automatically the proper mixture.

The invention comprises the novel features of construction and arrangement and combination of parts hereinafter described and particularly set forth in the appended claims.

An embodiment of my invention is illustrated in the accompanying drawing, in which:

Figure 1 is a sectional elevation showing a portion of the air intake to a charge forming device or. carbureter with my invention applied thereto; Fig. 2 is a plan View; Fig. 3 is a side elevation; Figs. 4 and 5 are views of details. I

Referring by reference characters to this drawing, the numeral 1 designates the air intake of a charge forming device or carbw reter which, as it may be of the ordinary or any desired-construction except so far as relates to the air intake, need not be shown or described herein.

Upon the upper end of the air intakeis mounted a cylindrical member 2 which may be provided with a flange 3 by which it may be bolted to the flange 4L of the mouth of the air intake.

Extending upward from the flange 5 at the top. of the member 2 are a plurality-of posts 6, preferably two, in the forked upper ends 7 of which are pivotally mounted levers 8 which carry at or near their outer ends weights 9. These weights are movable on the arms so as to be capable 'of longitudinal adjustment to suit conditions. any

suitable means, such as lock nuts 10, be-

ing provided to hold them in their adjusted position. H

The inner ends of the levers are connected by links 11 with a rod or plunger 12 which passes through an opening in the spider 13, which extends across the mouth of the air intake. The spider preferably has an upwardly extending collar or flange 13 through which passes a pin 14 which engages a longitudinal groove in the plunger, thus forming a spline connection, resisting any tendency of the plunger to rotate.

To the lower end of the rod or plunger 12 is connected a head or piston 15 which accurately fits the interior of the air intake cylinder 2, and is provided with a plurality of openings 15. A plate or disk 16 is rotatably secured to the bottom of the head or piston 15 by a screw 17 or the like, and this plate is provided with a plurality of openings 16 corresponding to the openings in the piston.

The plate or disk 16 has-at one side a pin or projection 18 moving iii a cam guide'19 carried by the cylinder, so that as thehead and plate move vertically together rotary motion will be imparted to the plate by the engagementof the projection with this..- cam guide. A convenient manner of forming the cam guide is to provide the piston with a rabbet as indicated at 15* and form the cam guide in the shape of an inclined or points in its sides with ports or openings 23 over which are located vertically slidable plates or gates 24, also provided with openings 2t, these plates being guided by flanges or ribs 25 on the sides of the cylinder. These sliding plates are connected by links 26 with the weighted lovers, the connection at one end of the links bemg madeadjustable, as indicated at 2 7.

From the foregoing description it is "thought the operation of the auxiliary air device will be readily apparent, but it may be briefly stated as follows: Under normal conditions, the action of gravity on the weights will cause them to descend as far as is permitted by the piston and sliding weights or gates,'the parts resting inthe position shown in Fig. 1. The parts are so arranged that when .in this position only a minimum amountof'air is admitted to the air intake. When, however, the suction in the air intake, increases, as, for example, upon-\opening the throttle of an internal combustion engine to which the lve of the charge for-mingdevice is attache this increase of suction draws the piston down, and as the piston descends, the revolving head is suction of thepiston to vary the size of the w ried by the' piston, said piston and plate havmg ports or openings, and a pin and cam nected through links with said piston,

given a rotary sliding movement on the face 1 of the piston, bringing the ports of the plate more in alinement with the ports of the piston, and simultaneously the plates covering the openings of the cylinder are raised to bring the two sets of ports at the sides more into alinement, and thus admitting more air, the quantity of air admitted varying with the suction within the air intake.

Having thus described my invention what I claim is: i 1. An auxiliary valve for chargeform'mg devices comprising an air intake member having a part provided with an'opening, an apertured plate mounted to have movement with relation to said part to vary the size of the opening, a weighted lever and a con- 1 nection operating automatically under the opening, substantially as described.

2. The combination with an air intake member of a charge forming device, of acylindrical part having a piston mounted to movetherein, a pivoted lever having one end connected to said piston and a weight'carried upon the other end, a rotary plate cargroove connection between the rotary plate and thecylindrical part, substantially as described. I

3. In combination with an airintake of a charge forming device, an apertured piston adapted to reciprocate therein, posts extending upward from said cylinder part, a pair of levers pivotally mounted in the upper ends of said posts, and having their ends conweights carried by said levers, a rotary plate carried by said piston, said piston and plate having ports or openings, ports in-the side walls of said cylindrical member, 'sliding plates having ports cooperating with said ports in the cylinder, and linksconnecting said sliding plates with the levers,"substan tially as described.

4. In combination with the air intake of a charge .forming device, a cylindrical member,

a piston mounted to move therein and hav- 7 ing into the rabbet of the piston, and having an inclined guideway, a pin carried by the rotary plate engaging said guideway, and yielding means-for holding the piston normally elevated, substantially as described.

5. In combination a cylindrical member having a spider at its outer end, a plunger guided in said spider and having a splined connection therewith, a piston' carried by said plunger within the cylindrical member, a plate rotatably mounted upon the piston, said piston and plate having cooperating ports, means whereby the vertical movement of the piston efifects rotary movement of the plate, a pair of oppositely extending levers having their inner ends linked to said plunger, and weights carried by the outer ends of said levers, substantially as described.

6, In combination a cylindrical member I having a spider at its upper end, a plunger guided .in said spider and having a splined connection therewith, a piston carried by said plunger within the cylindrical member, a plate rotatably mounted upon the piston,

said piston and plate having cooperating I ports, means whereby the vertical movement of the piston efi'ects rotary movement of the plate, a pair of oppositely extending levers having their inner ends linked to said plunger, said cylindrical member having ports in its sides, sliding plates having apertures cooperating with said lastnamed ports, and links connecting said plates with the levers between their pivot points and the weights, substantially as described.

In testimony whereof, I aflix my signature in presence oftwo witnesses.

, JACOB H. FRIEDENWALD. 

